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// Exa 9.3
// To calculate final phase for the pi/4-DQPSK modulation method.
clc;
clear all;
B=['00','10','01','11','01','00','11','10','10','01','01','00'];//Given Bit stream
//solution
disp("Phase transition table for pi/4-DQPSK Modulation is given as ")
disp(" By Referring Table 9.1 on page No 266 i.e");
disp("Symbol Phase transition")
disp("00 => 45°");
disp("01 => 135°");
disp("10 => -45°");
disp("11 => -135°");
disp("");
disp("sym Dell phi(k) Phi(k)")
//BitStream='001001110100111010010100';
phase=0; //Taking initial phase as zero
for i=1:12
if(B(i)=='00')
phase=phase+45;
printf(' %s 45 %d \n',B(i),phase);
end
if(B(i)=='01')
phase=phase+135;
printf(' %s 135 %d \n',B(i),phase);
end
if(B(i)=='10')
phase=phase-45;
printf(' %s -45 %d \n',B(i),phase);
end
if(B(i)=='11')
phase=phase-135;
printf(' %s -135 %d \n',B(i),phase);
end
end
disp("");
printf('final phase for the pi/4-DQPSK modulation method for given bitstream is %d degree\n',phase);
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